The important goal of big data application is to transform the old management mode and improve the overall benefits of social management and economic production. In 2019，the big data application has entered the deep integration development stage. The policy system of big data development was stable and mature while the technological ecology was abundant and diverse，and the industry has developed prosperously as well. All of the above factors provided the basic conditions for the deep integration of big data application. At present，the big data industry with data as the production factor needs to be formed；unified cross-industry data standards and evaluation systems to measure the development level of big data need to be built；the big data security laws and regulations need to be refined；the data security technology needs to be strengthened. Meanwhile，with the deep integration of big data application and entity economy，the core technology of big data application will be close to the field of social management and entity economy. It will develop towards specialization and diversification，and thus the demands for cross-field and cross-professional talents will be more great.